import utime
from machine import Pin
import _thread
utime.sleep(0.1) # Wait for USB to become ready

print("Hello, Pi Pico!")

led_interno = Pin(4, Pin.OUT)

semaforo = _thread.allocate_lock()


def primeira_thread():
    while True:
        semaforo.acquire()
        print("Primeira Thread")
        utime.sleep(0.1)
        semaforo.release()

_thread.start_new_thread(primeira_thread, ())


while True:
    semaforo.acquire()
    led_interno.toggle()
    utime.sleep(1)
    semaforo.release()